PowerShell Litmus Test
PowerShell Cmdlet Litmus Test
Amateurs: Use Get-Help to get an overview of what a
Example of Get-Help's Syntax
Here we employ Get-Eventlog to discover more about Get-Help.
# Needs a LogName
The problem, Get-Eventlog is asking us for an input (LogName). Suppose we don't know the precise logname? Let us call for:
# Cmdlet help with examples
-- But Get-Eventlog also has a second usage --
Get-EventLog [-AsString [<SwitchParameter>]] [-ComputerName <String>] [-List [<SwitchParameter>]] [<CommonParameters>]
Note: Get-EventLog requires -LogName parameter.
Note: Get-EventLog also reveals the names of the logs thanks to the -List parameter thus:
# Display available logs
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You mainly request help to check the names of the parameters, but it only takes a quick glance to discover a parameter's attributes.
-After <DateTime> At first glance you probably overlooked the <Type> definition in brackets, but now in future you will absorb this extra information.
In this example, knowing that -After expects <DateTime> will alert you to researching the format, especially if you get an error. Get-Date may give you clues whether to use dd/mm/yy or mm/dd/yy.
-ComputerName <String> Clearly this indicates a parameter that accepts names such as BigServer, subtly, the square brackets tells you that you could type multiple names separated by commas. -ComputerName [BigServer, LittleServer]
-List [<SwitchParameter>] This is a tricky 'Type' to understand at first. At it's simplest <SwitchParameter> means the value for this parameter is 'false', unless you explicitly set a value.
-Newest <Int32> Means a number!
Summary of PowerShell's Get-Help
I would like to move forward from merely using Get-Help, to gaining an understanding of the range of a cmdlets abilities. Get-Help Verb-Noun can teach you about the principles behind PowerShell, for example, pipelining, nature and capability of objects.
Over 40 of Guy's litmus tests. Have fun while you learn about aspects of computing. Stacks of ideas to check your servers, networks and security.
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